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<?php
/*
* This file is part of the JsonSchema package.
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace JsonSchema\Iterator;
/**
* @package JsonSchema\Iterator
*
* @author Joost Nijhuis <jnijhuis81@gmail.com>
*/
class ObjectIterator implements \Iterator, \Countable
{
/** @var object */
private $object;
/** @var int */
private $position = 0;
/** @var array */
private $data = array();
/** @var bool */
private $initialized = false;
/**
* @param object $object
*/
public function __construct($object)
{
$this->object = $object;
}
/**
* {@inheritdoc}
*/
public function current()
{
$this->initialize();
return $this->data[$this->position];
}
/**
* {@inheritdoc}
*/
public function next()
{
$this->initialize();
$this->position++;
}
/**
* {@inheritdoc}
*/
public function key()
{
$this->initialize();
return $this->position;
}
/**
* {@inheritdoc}
*/
public function valid()
{
$this->initialize();
return isset($this->data[$this->position]);
}
/**
* {@inheritdoc}
*/
public function rewind()
{
$this->initialize();
$this->position = 0;
}
/**
* {@inheritdoc}
*/
public function count()
{
$this->initialize();
return count($this->data);
}
/**
* Initializer
*/
private function initialize()
{
if (!$this->initialized) {
$this->data = $this->buildDataFromObject($this->object);
$this->initialized = true;
}
}
/**
* @param object $object
*
* @return array
*/
private function buildDataFromObject($object)
{
$result = array();
$stack = new \SplStack();
$stack->push($object);
while (!$stack->isEmpty()) {
$current = $stack->pop();
if (is_object($current)) {
array_push($result, $current);
}
foreach ($this->getDataFromItem($current) as $propertyName => $propertyValue) {
if (is_object($propertyValue) || is_array($propertyValue)) {
$stack->push($propertyValue);
}
}
}
return $result;
}
/**
* @param object|array $item
*
* @return array
*/
private function getDataFromItem($item)
{
if (!is_object($item) && !is_array($item)) {
return array();
}
return is_object($item) ? get_object_vars($item) : $item;
}
}